dcb: use __dev_get_by_name instead of dev_get_by_name to find interface
authorYing Xue <ying.xue@windriver.com>
Wed, 15 Jan 2014 02:23:39 +0000 (10:23 +0800)
committerDavid S. Miller <davem@davemloft.net>
Wed, 15 Jan 2014 02:50:46 +0000 (18:50 -0800)
commitd9ac62be5740272f495154469cc9f77feb8d541a
tree9ff0ca3ae3c0f647d402baf1cd6d1a3b1b63ba4f
parentebd93a7daf40d61b994b9928dd7bf26e0dcca10d
dcb: use __dev_get_by_name instead of dev_get_by_name to find interface

The following call chain indicates that dcb_doit() is protected
under rtnl_lock. So if we use __dev_get_by_name() instead of
dev_get_by_name() to find interface handlers in it, this would
help us avoid to change interface reference counter.

rtnetlink_rcv()
  rtnl_lock()
  netlink_rcv_skb()
    dcb_doit()
  rtnl_unlock()

Cc: John Fastabend <john.r.fastabend@intel.com>
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/dcb/dcbnl.c